What are the hazards of wearing contact lenses? _Contact lenses_

Contact lenses are the most popular, fashionable and convenient types of glasses in the eyewear industry. Compared with ordinary frame glasses, it is favored and supported by many consumers because of its convenience, beauty, and the effect of enlarging and brightening eyes. However, contact lenses are medical products that directly contact the cornea, so they can cause damage to the cornea to a certain extent, so let's take a look at the hazards of wearing contact lenses. Contact lenses, which are worn directly on the cornea, can effectively correct vision or protect the eyes from loss of vision. However, wearing glasses is still dominated by frame glasses, supplemented by contact lenses, because wearing contact lenses has many hazards, such as: <1>. It is easy to cause a variety of eye diseases, keratitis, conjunctivitis: because contact lenses are in direct contact with On the cornea of u200bu200bthe eyeball, if the time is too long, it will lead to hypoxia of the cornea and conjunctiva, which will lead to the increase of bacteria in the eye, causing keratitis and conjunctivitis. <2>. Acute or chronic congestion of the fundus: The contact lens is directly attached to the eyeball, and the tears in the eye contain a variety of sediments, such as collagen, protein, lipid, etc., which cause lens pollution and lead to excessive hypoxia in the fundus. Congestion phenomenon. <3>. Reduce the resistance of the eye: If the cells in the eye are hypoxic for a long time and cannot be exposed to the air for a limited time, it will trigger a 'altitude sickness' similar to the human body, resulting in the cells in the eye not being able to metabolize normally, and the resistance will be reduced. will decline. <4>. Corneal edema, optic nerve palsy: contact lens easily absorbs nutrients such as protein, lipid and collagen in tears, nourishes bacteria, reduces corneal sensation, and causes optic nerve terminal palsy, corneal swelling and other adverse reactions. <5>. Dry eye syndrome and visual fatigue: Wearing contact lenses for a long time will lead to excessive adjustment of the eyes, causing visual fatigue, dry eye syndrome, etc.; Burning eyes and blurred vision. Although contact lenses are beautiful, convenient and easy, they can enlarge and brighten the eyes, and make the eyes watery, but when wearing glasses to correct vision, frame glasses are mainly used. At the same time, consumers who like to wear contact lenses should wear them for no more than 10 hours a day, and remember to keep the lenses hygienic and clean.